"hydraulic press" newsreels and historical clips

... The most used method is pressing in hot closed forms.

Samples of products obtained in this way.

Samples of press materials.

Phenoplast is used in the production in the form of powder or tablets.

A cartoon explaining the processes occurring in the material during such pressing.

The process of preparing ...

... the initial phenoplast tablets.

Samples of tablets.

Presses and molds.

The main parameters of pressing are temperature, pressure and the time or duration of the stay of the material in the mold, fixed by a time relay.

A cartoon explaining the pressing process.

Removal of the product from the mold.

A cartoon ...

... cartoon explaining the physico-chemical phenomena occurring during the pressing process.

Chemical formula of the material.

A cartoon explaining the process of pressing tablets.

Product quality control.

The most important technological property is fluidity.

Checks are carried out by different methods. ...

A cartoon explaining the principle of choosing the pressing temperature of the material to obtain the best quality of the finished product.

The holding time of the product in the mold should be sufficient to achieve a shear stress of 25 kg / cm2.

If the shear stress is less, the product may be destroyed ...

... requirements.

If a preheated material is loaded into the Konavets device, the kinetics of curing will change.

A cartoon explaining the process.

When the press material overheats, it loses its viscous state, cures quickly, and the strength index drops sharply.

The product does not have time to take shape.

Preliminary ...

... temperature of preheated novolac press powders on existing presses is 180 degrees.

If the temperature is exceeded, curing may occur before the part is fully formed.

This will lead to deterioration of the properties of the finished product.

Samples of defective products.

The pressing temperature and curing speed ...

... the pressed material and the mold configuration.

Materials with low viscosity or molds with a simple configuration do not require high pressure.

A material with high viscosity and a complex mold of a product with thin walls requires high pressure.

Samples of materials with high viscosity.

Pressing in ...

... in single-socket and multi-socket forms.

A cartoon explaining pressing in multi-nest forms.

... the disadvantages of pressing tablets in multi-socket forms.

Presslitje.

A cartoon explaining the presslitya process.

A sample of the product obtained by pressing.

Pressing in hot stitched forms.

A cartoon explaining the pressing process in hot stitched forms.

The method of pressing in cold closed forms ...

... subsequent heat treatment in the production of abrasive products.

The main components of the pressed mass are abrasive and phenolic-formaldehyde resin.

The prepared mass is loaded into the mold.

Under the press, the mass is compacted and molded.

The formed product enters the bakelizer, where it is heated ...

... or resin resins are pressed on hot plates.

Samples of fillers.

Bags of impregnated filler are placed between metal polishing sheets lubricated with anti-adhesive substances.

After the packages are assembled, pressing is carried out between the hot plates of the floor hydraulic press.

The end sides of the ...

... leakage is possible.

A cartoon explaining this method and its disadvantages.

Decompression of packages.

Very valuable plastic materials are produced by pressing on hot plates, for example, textolite, decorative laminated plastics, fiberglass, chipboard and other materials.

A ladle with molten metal.

Casting metal from the bucket into molds.

A cartoon explaining the hydraulic casting process.

A mold for thick-walled casting is being assembled.

If the temperature of the metal is high enough, then filling out the form takes place without difficulty.

When a metal moves with ...

... the conveyor line.

Movement of rock mass by means of hydraulic transport.

The operation of the hydraulic monitor.

The pipeline.

Hydraulic dump.

The operator who controls the hydraulic monitor.

Pumping station.

Changing the nozzle on the hydraulic monitor.

Dredging station.

Cleaning of pulp receivers ...

... filter.

The main parts of the full-flow filter.

"Cooling system".

Cartoon diagram of the cooling system operation.

Hydraulic coupling.

Hydraulic coupling operation (animation).

Hydraulic coupling drive of the fan.

Assembled Model 740 engine.

Cars of the KAMAZ family.

... work several shifts.

The most important part of the hydraulic drive of the machine is the hydraulic distributor of the working fluid flow.

The placement of hydraulic equipment for different sizes of machines may be different.

Placement of hydraulic equipment at the excavator EO4121A.

Cartoon explaining ...

... powerful hydraulic excavators are equipped with a crawler.

Each caterpillar is driven by its own hydraulic motor through a gear reducer.

Hydraulic cylinder that provides tension of the track belt.

Less powerful excavators are equipped with pneumatic wheels.

The driving wheels are driven by a hydraulic motor ...

... provided by a hydraulic cylinder.

Braking is carried out by means of pneumatic chambers.

An important node of the machine is a running trolley with a central collector.

A cartoon explaining the device of a running trolley.

The rotary platform rotates from a low torque axial piston hydraulic motor or from ...

... from a high torque hydraulic motor.

A cartoon explaining the operation of a high-torque hydraulic motor.

The front steerable axle has a balancing suspension.

Thanks to it, the rotary platform always maintains a horizontal position.

Hydraulic supports increase the stability of the excavator and release ...

... be single-link or double-link.

The elements of the working equipment and hydraulic cylinders are pivotally connected to each other.

The hydraulic cylinder of the working body can be located above or below the handle.

The hydraulic drive is capable of creating large forces on the working organ.

The reverse ...

In addition to axial-piston, there are radial-piston designs of hydraulic motors.

A cartoon explaining the operation of a radial piston hydraulic motor.

The excavators use double-acting piston hydraulic cylinders.

Hydraulic cylinder in the section.

Rubber seals of the rod and piston.

A cartoon explaining ...

... the working fluid in hydraulic systems and protect against overheating.

The main condition for long-term operation of machines is the purity of the working fluid.

Filters with replaceable filter elements are used to purify the liquid.

Filter assembly.

The distribution hydraulic equipment changes the ...

... shown on a sample with an internal cross section.

Hydraulic valves can be monoblock and sectional, allowing you to assemble complex distribution schemes and easily replace worn sections during repair.

A cartoon explaining the various schemes of hydraulic valves.

Combining work operations reduces the working ...

... overhaul almost completely renews the excavator.

It is carried out after 4000 hours.

Before entering the workshop, the machine is washed with hot water.

Hydraulic units are marked.

Strict requirements are imposed on the pump body, at the slightest cracks they are sent to scrap metal.

When creating modern machines ...

... characteristic feature of the modern overhaul is the replacement of the entire hydraulic drive units and units.

Before starting the repair of pumps and hydraulic motors, they are washed in washing machines.

Especially contaminated hydraulic equipment units are washed with hot degreasing solutions under pressure ...

... components of hydraulic equipment are undergoing major repairs, the wear of which can significantly disrupt the operation of the excavator.

All sealing parts, gaskets and rubber rings must be replaced.

If a malfunction is suspected, bearings, inner rings and gears are replaced.

Hydraulic motors and pumps ...

... stands.

Overhaul of other parts.

High torque hydraulic motors are installed on a rotary platform on special control pins.

When repairing hydraulic valves, the accuracy of surface treatment is of great importance.

Processing on a grinding machine.

The hydraulic valves assembled after repair are tested on ...

... on special stands.

During major repairs, the hydraulic cylinders are completely disassembled.

The technical condition of all parts is checked.

If necessary, the inner surface of the hydraulic cylinder is rolled out.

Cylinder rods are carefully ground or rolled.

Parts that cannot be restored are made anew ...

... anew.

All cylinders are subjected to mandatory hydraulic tests after repair.

Replacement of pipelines.

Repaired and painted excavators are sent to construction sites by rail.

Excavators are delivered by road to nearby objects.

Alternating frames with different excavators.

... on the road going trucks.

Trucks on the road.

Big unloading of the truck.

Large tipping the truck body.

Large hydraulic mechanism that lifts the body of the truck.

Two workers repair a hydraulic mechanism of the truck.

Panorama of trucks that have dumped the body.

A group of scientists headed by S. I. ...

... pointer instruments.

The water sampling.

The two scientists examine the graph.

Testing of hydraulic structures in the laboratory.

"Get the picture".

Training class in the SAI.

Large speed limit sign.

The man pulled the press out of the mailbox.

The man pulls out an envelope.

In the envelope a photo of the car ...

... oil production (animation).

Production of diaphragm electric pumps.

A helicopter is flying over an oil field.

Installation of hydraulic piston pumps.

Operation of the hydraulic piston pump (animation).

Workers change the pump.

Gas lift method of oil production (animation).

Compressor unit.

Well repair ...